/Engine/Source/Editor/PlacementMode/Public/IPlacementModeModule.h
Constructor that takes a specific factory and asset
FPlaceableItem ( [UActorFactory](API\Editor\UnrealEd\ActorFactories\UActorFactory) * InFactory, const [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) & InAssetData, [TOptional](API\Runtime\Core\IO\TOptional)< int32 > InSortOrder )